I was considering getting a Corsair RM650X PSU, priced at £91.97, but I checked the "Holiday buyer's guide 2016" and saw that Linus used a 500W EVGA PSU that was quite a bit less than the price of the corsair (£57.06), and the 650W version of that is just a few quid more. Is it worth foregoing modularity and efficiency for quite a large saving on cost?
EDIT: Planned components are:
Ryzen 5 1500X, 1600, or 1600X (yet to decide)
Prime B350M-A Motherboard
Single Stick 8GBCrucial DDR4 2400
Nvidia GTX950 (planning to upgrade this in near future, possibly to 1060,1070 or something from Vega)